/*
 * Copyright 2004 - 2012 Mirko Nasato and contributors
 *           2016 - 2017 Simon Braconnier and contributors
 *
 * This file is part of JODConverter - Java OpenDocument Converter.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jodconverter.cli.util;

import org.junit.rules.ExternalResource;

/**
 * Class rule used providing a way to prevent a call to System.exit to actually shutdown the VM.
 * Instead, a ExitException is thrown.
 */
public final class NoExitResource extends ExternalResource {

  @Override
  protected void before() throws Throwable {

    // Don't allow the program to exit the VM
    System.setSecurityManager(new NoExitSecurityManager());
  }

  @Override
  protected void after() {
    super.after();

    // Restore security manager
    System.setSecurityManager(null);
  }
}
